Users of the QRZ.com callsign database must now be registered and sign in before getting access to any name or address data. Owner Fred Lloyd, AA7BQ, explained in a posting that routine access to the database was being slowed down by a growing number of automated systems trying to harvest massive amounts of data at one time. Registration is free; ham users may access a maximum of 150 callsigns/day (not including their own); non-ham users are limited to 25 lookups per day, and QRZ subscribers will continue to have unlimited access.